Lincoln Electric LN-8 SVM132-A User Manual
Ln-8 semiautomatic wire feeder, Service manual svm132-a
LN-8 SEMIAUTOMATIC WIRE FEEDER
SERVICE MANUAL
SVM132-A
May, 2002
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thought-
ful operation on your part. DO
NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOUT.
And, most
importantly, think before you act
and be careful.
For use with code numbers: 9963, 9964
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Copyright © 2002 Lincoln Global Inc.
RETURN TO MAIN INDEX
Document Outline
- Master Table of Contents
- Safety
- Section A - Installation
- Section B - Operation
- Section C - Accessories
- Section D - Maintenance
- Section E - Theory of Operation
- Section F - Troubleshooting and Repair
- Symptoms
- No wire feed or arc voltage when the gun trigger is activated. The drive rolls do not turn. The LN-8 appears “dead”.
- The wire feeds when the gun trigger is activated but there is no arc voltage.
- The wire continues to feed with the gun trigger open, and the wire is electrically “hot”. The interlock switch is in the “off” position.
- With the interlock switch (S2) in the “ON” postion, the wire feed stops when the gun trigger is released.
- The circuit breaker (5 amp) repeatedly trips when the gun trigger is activated.
- The circuit breaker (5 amp) trips when power is applied to the LN-8. Gun trigger is NOT activated.
- The 1/2 amp fuse on the relay board repeatedly fails.
- The drive motor thermostat “opens” while welding.
- The wire feed speed cannot be controlled. The motor runs and feeds wire but the speed cannot be changed regardless of control setting.
- The wire feed “coasts” when the gun trigger is released.
- The wire feeds normally and welds but the solenoid is not operating.
- When the gun trigger is activated the wire “backs up” instead of feeding forward.
- When the gun trigger is activated, the drive rolls turn but the wire will not feed or wire feeding is rough.
- The welding arc is variable or “hunting”.
- Poor arc striking with sticking or “blast offs”. The weld bead may also be ropey and display weld porosity.
- Section G - Electrical Diagrams